Be careful with the HI LOW. Good rule of thumb it, should always be in HI gear unless you get stuck and need 4X4 right off the bat under 5mph. I know your not suppose to run above 30 or 40mph in LO, on my dads chevy silverado, sends to much torq to wheels or something?
The only time I use the LO option is to yank people out of the snow and you need that extra help from a stand still.
If you do ever use the LO option pop him/her (whatever you call your VX) into netural, firmly press brake, throw her into LO but wait until it engages before you let your foot off brake. Then let her rip! Then just reverse the cycle to put it back into HI gear.